yup you can! all depends on the plan you get and who your carrier is. My GF has T-Mobile and there was no extra charge to use the phone as a hotspot. Just uses up your data, but very handy if you just have a wifi iPad, like we do.
Depends on the smartphone. If this is dealbreaker for you then make sure before you buy. It's like buying anything else: buy based on your needs/wants/preferences/budget/etc. Don't just assume.Most smartphones can do that ?
Nope. Consider that countless WiFi access points don't run IOS and work just fine with IOS devices (as well as other clients running different OS's). WiFi is WiFi.Operating system used does not matter ?
Most smartphones can do that ?
You can bluetooth tether an iphone to an ipad. I don't see why you couldn't with another one. I will try my nexus later and post back.